TW200426025A - Precoated metal sheet for light reflectors - Google Patents

Abstract

The present invention provides a precoated metal sheet, for light reflectors, having a high diffuse reflectance of visible light, and also provides the electric or electronic apparatus using it. The precoated metal sheet comprises a metal sheet or plated metal sheet, a visible light reflective undercoat having a thickness of 3 to 30 micrometers provided on at least one surface of the metal sheet or plated metal sheet, and a visible light reflective overcoat having a thickness of 10 to 40 micrometers provided on the visible light reflective undercoat. The visible light reflective undercoat comprises a binder resin and a titanium oxide, a content of the titanium oxide in the visible light reflective undercoat being 40 to 150 parts by weight based on 100 parts by weight of a solid content of the binder resin, and the visible light reflective overcoat comprises a fluororesin-containing binder resin and a titanium oxide, a content of the titanium oxide in the visible light reflective overcoat being 40 to 150 parts by weight based on 100 parts by weight of a solid content of the binder resin.

Description

200426025 发明, Description of invention:

[Technical field to which the invention belongs; J TECHNICAL FIELD The present invention relates to a pre-coated metal 5 plate that can be used as a reflective plate material. In addition, it also relates to a lighting device, an AV device, a mobile device, a plasma display panel, and an LCD television. Such electrical and electronic equipment has a function of emitting visible light and a plate for reflecting visible light emitted by the function. Background Art Lighting equipment, AV equipment, mobile equipment, plasma display panels, and liquid crystal televisions have functions such as illuminating the surroundings, transmitting optical signals, or reflecting light images by emitting visible light. These machines are provided with a reflecting plate, which then reflects light to the reflecting plate, thereby increasing the brightness of the light or changing the direction of the light, etc. Therefore, in order to prevent the amount of light from decreasing when the light is reflected on the reflecting plate, a highly visible light reflectance is required on the surface of the reflecting plate. Heretofore, as a means for improving the reflectance of the surface of a reflecting plate, 'a metal is polished to make it a mirror surface, or a white coating material having a high reflectance is applied. In addition, a product catalog "view-coat" of Shin-Yoshimoto Steel Co., Ltd. has also disclosed a pre-coated steel sheet for a reflective sheet of a lighting appliance, which is coated with a white paint in advance. In addition, Japanese Patent Application Laid-Open No. 10-730 has disclosed a technology of a light-reflective film, that is, a metal thin film layer and a resin layer containing thermomechanical particles are sequentially laminated on a surface of a base film. It is made of aluminum, and the refractive index of the inorganic fine particles constituting the inorganic trace-containing lipid-reading layer is ~ 5 200426025 and the refractive index of the resin constituting this layer is iib, nf ~ nb — 0.4, which can be used as a liquid crystal display device. Excellent reflector. Further, a technique for coating a metal plate with a high diffusion reflection on the back panel of a liquid crystal display has been disclosed in Japanese Patent Application Laid-Open No. 2002-172735, that is, an undercoat layer having a film thickness of 50 to 100 μm is formed on an aluminum plate. The coating layer contains 150 to 300 parts by mass of a titanium oxide pigment with respect to 100 parts by mass of the resin, and forms an overcoat layer having a gloss of 15 or less and a film thickness of 10 to 30 μm on the undercoat layer. 100 parts by mass of 100 to 250 parts by mass of a titanium oxide pigment is used as a reflector for a backlight of a liquid crystal display. However, in recent years, reflectors used for electrical appliances such as lighting reflectors and liquid crystal displays have become complicated due to the structure and design of electrical products. With this phenomenon, reflectors have been processed into various shapes before being used. Demand is also increasing. However, when a thin film is used as a substrate as in the technique disclosed in Japanese Patent Application Laid-Open No. 10-730, it is difficult to shape a thin film in which a metal thin film layer and a resin layer containing inorganic fine particles 15 are laminated to a desired shape in advance, and the thin film must be formed in advance. After forming into the desired shape, a metal thin film layer and an inorganic fine particle-containing resin layer are laminated. However, when the shape of the reflecting plate is very complicated, it is difficult to layer the film thickness evenly on the processed portion. On the other hand, in the technique disclosed in Japanese Patent Application Laid-Open No. 2002-172735, although an undercoat layer and an overcoat layer are previously coated on a name plate and then subjected to forming processing, the amount of titanium oxide added to the reflective film is excessive. However, the coating is brittle, and problems such as cracking of the reflective film or peeling of the coating film occur during processing. In addition, the inscription as a base material is not very good in terms of workability and formability, so it has the disadvantage of limited formability. What's more, if the coating is produced by a general pre-coating roller coater for the production line of 2004200425, it is very difficult to apply the cold layer under the film thickness (50 ~ 100) in a single shot, so 2 It is difficult to use the electrical products that require the reflective plate to be shaped and processed more because of the structural and design reasons of electrical products. For the reflectors cut out in JP-A-Heisei 10-730 and JP-A-Ko2-100735, it is necessary to use a conventional pre-coated steel sheet for a reflector plate of a lighting fixture which is previously coated with a white paint. With the digitization of electrical products in recent years, the problem of heat generation of electrical products has gradually been produced. The means to solve this problem has been disclosed in Japanese Patent Application Laid-Open No. 2002-228285. A technology that improves the heat release rate by 70% or more. I: Summary of the invention: | The invention discloses that the aforementioned electrical products are intended to be brighter than the existing ones, or even have less power consumption than the existing ones. The demand for brightness, etc. is gradually rising. Even for electrical products that must be processed and reused for reflectors, similarly, the aforementioned electrical products can be made brighter than existing ones, or even with less power consumption. The demand for the same brightness and the like as the conventional ones is also increasing. Therefore, the object of the present invention is to provide a metal plate that can improve the diffuse reflectance of visible light, and an electric and electronic device using the metal plate. As a result of careful review, it was found that the visible radiation consisting of a binder resin and titanium oxide can be laminated on a metal plate or a metal plate that has been plated (a raw coating film, and a binder resin composed of a fluorine-containing resin and A visible light reflective topcoat film made of titanium oxide can be used to obtain a pre-coated metal plate with excellent processability and reflection. In particular, the visible light reflective topcoat film of the present invention is made of a fluorine-containing resin. The binder resin is composed of titanium oxide, which is because the refractive index of the binder resin containing the I-based resin in various resins is relatively low, and titanium oxide is refracted compared to other surfaces. The binder is very high, so the difference in refractive index between titanium oxide is very large, which makes it easier for visible light to reflect the interface of the IU resin-containing binding grease and titanium oxide in the film, thereby improving the reflectance. Therefore, The larger the total area of the interface between the binder resin of the fluorine-containing resin and the titanium oxide formed in the film, the higher the reflectivity.-After careful review by the inventors of the present case, the following matters were also found. That is, the combination with the money-based resin _When titanium oxide is added to the lipid, if the amount of titanium oxide is too small, visible light will penetrate the film, or the total area of the interface between the knitting grease and the oxocyanine will be less. 'The visible light reflectivity of the film is very low. With oxidation The increase in the amount of titanium decreases the transmittance of the visible light film, and the visible light reflectance of the film increases by π because the total area of the interface between the binder resin and the titanium oxide gradually increases. However, the amount of titanium oxide is added at a fixed amount The amount is the peak value, and the right is more because the capacity of titanium oxide is larger than the capacity of the binder resin, and the interface between the combined gas resin and titanium oxide is reduced, so that the visible light reflectivity of the present invention is based on this Solutions were completed its gist the following. 1) A pre-coated metal plate for a reflective plate is provided on at least one side of the metal plate or the plated metal plate and has: a visible light-reflective undercoat film containing a binder resin and oxidation = and a film thickness of 3 to 30 μm And a visible light reflective top coating film containing a binder resin containing fluorine-based resin and titanium oxide and having a film thickness of 10 to 40 μm, provided on the visible light reflective lower coating film; and in the visible light reflective undercoating film, The amount of titanium oxide added is 40 to 150 parts by mass based on 100 parts by mass of the solid part of the binder resin, and the amount of titanium oxide added in the visible light reflective topcoat film is 10 () parts by mass of the solid part of the binder resin. 40 to 150 parts by mass. 2) The pre-coated metal plate for a reflective plate as described in 1) above, wherein the visible light reflective topcoat film has a thickness of 10 to 30 μm. 3) The pre-coated metal plate for a reflective plate as described in 1) or 2) above, wherein the fluorine-based resin contained in the binder resin of the visible light reflective film is a trifluoride resin 0 4) As described in 1) to 3) above The pre-coated metal plate for any one of the reflective plates, wherein one or one of the visible light reflective upper coating film or the visible light reflective lower coating film is composed of only a binder resin and titanium oxide. 5) The pre-coated metal plate for a reflective plate according to any one of 1) to 4) above, wherein at least one of the visible light reflective lower coating film and the visible light reflective upper coating film contains silicon dioxide or dioxide At least one of silicon-based pigments. 6) The pre-coated metal plate for a reflective plate as described in 5) above, wherein the silica dioxide pigment is silicon dioxide with metal ions adsorbed. 7) The pre-coated metal plate for a reflective plate according to any one of 1) to 6) above, which has a visible light reflective undercoat film and a visible light reflective topcoat on one side of the metal plate or the plated metal plate And a heat-absorbing film on the other side. The heat-absorbing film has a wave number of 600 to 300 cm measured at a specific temperature of 80 ° C to 200 ° C. The total infrared emissivity in the -1 area is above 07260200425. 8) The pre-coated metal plate for a reflective plate as described in any one of 1) to 7) above, wherein the surface roughness of the metal plate or the plated metal plate is 0_05 ~ 1 · 8μηι in terms of Ra. 5) The pre-coated metal plate for the reflective plate as described in 1) above, wherein the metal plate or the plated metal plate is a steel plate or a plated steel plate. 10) An electric and electronic device, which is composed of a pre-coated metal plate for assembling the reflective plate of any one of 1) to 9). Brief Description of the Drawings 10 FIG. 1 is a schematic cross-sectional view showing an embodiment of the pre-coated metal plate of the present invention. Fig. 2 is a schematic sectional view showing another embodiment of the pre-coated metal plate of the present invention. Figure 3 is a schematic diagram of a device for measuring illuminance. 15 [Embodiment] The best form of implementing the present invention The light used for the light and light signals of fluorescent lamps and bulbs used in lighting appliances is visible light. Therefore, if the diffuse reflectance of visible light on the surface of the reflecting plate is further increased, the brightness of the light as a whole will be improved. The diffuse reflectance of visible light 20 varies depending on the material on the surface of the reflective plate. In addition, substances with high diffuse reflectance of visible light are known to be aluminum, silver, titanium oxide, barium sulfate, and zinc oxide. Therefore, with the adoption of these technologies, reflectors with very high reflectance have been produced today, and it is considered very difficult to increase the reflectivity even further. 10 The inventor of the present case found that a visible light-reflective undercoating film composed of a binder resin and titanium oxide can be laminated on a metal plate or a plated metal plate, and a fluorine resin-containing binder resin and titanium oxide can be laminated. The visible light-reflective top coating film can be used to obtain a pre-coated metal plate with excellent processability and excellent reflectivity. An example of the constitution of a pre-coated metal plate for a reflecting plate of the present invention is shown in FIG. The pre-coated metal plate is a pre-coated metal plate for a reflective plate, and includes: at least one side of the metal plate or the plated metal plate 1 is provided with a binder resin and titanium oxide and a film thickness of 3 to 30 μηι. Visible light-reflective undercoating film 2; and a fluorine-containing resin-containing binder resin and titanium oxide are provided on the visible light-reflective undercoating film 2 and the film thickness is 10 to 40 μm (more preferably 10 to 40 μm) 30 μπι) visible light reflective top coating film 3; and the visible light reflective bottom coating film 2 has an added amount of titanium oxide of 40 to 150 parts by mass relative to 100 parts by mass of the binder resin solid part, and the visible light is reflective The amount of titanium oxide added in the top coating film 3 is 40 to 150 parts by mass based on 100 parts by mass of the solid portion of the binder resin. The visible light reflective lower coating film 2 and the visible light reflective upper coating film 3 are laminated on both sides on the right, so that the visible light generated in the electrical and electronic equipment will be brighter and more ideal. In the description of the invention of this case, the visible light-reflective undercoat film 2 and the visible light-reflective topcoat film 3 are also collectively referred to as a visible light-reflective film. If the film thickness of the coating film under visible light reflectance of the present invention is less than 3, the reflectance will decrease and it is not suitable; X, it is difficult to cover the film thickness of more than 30 μπι with a roller coater and a curtain coater. Not suitable. In addition, if the film thickness of the visible light-reflective top coating film of the present invention is less than 1 (μ), the reflectance is reduced, which is not suitable; and it is difficult to cover more than 200426025 40 μιη by roller coater and curtain coater. The film thickness is also inappropriate. The total film thickness of the visible light-reflective lower coating film and the visible light-reflective top coating film is preferably 20 to 60 μm, and more preferably 20 to 50 μm. The binder resin of the coating film under visible light reflectivity can be generally known to the public, such as polyester resin, polyurethane resin, acrylic resin, diammine resin, vinyl chloride resin and fluorine-based resin. Resin, etc., and may be any of a thermoplastic type or a thermosetting type. These resins can also be used in combination of several kinds according to the needs. The special resins differ according to the type, molecular weight of the resin, and the glass transition temperature (Tg) of the resin. The properties of the film such as processability, processing adhesion and film hardness are also flourishing, so Although there are no special regulations, it needs to be appropriately selected according to needs. In addition, the type of 10 that uses a crosslinking agent to harden the resin also depends on the type and amount of the crosslinking agent, the type of catalyst and the amount of the catalyst during the crosslinking reaction. Properties, film hardness, etc. are different, so there are no special requirements but they need to be selected appropriately. These resins can be used after being melted or dissolved in organic solvents by solids, or pulverized into powders. 15 In addition, it can also be water-soluble or water-dispersible latex type. In addition, it may be an ultraviolet (UV) curing type or an electron beam (EB) curing type. However, in order to be able to be coated by a roll coater or a curtain coater, it is preferable that these resins are paint-soluble in a solvent. Commercially available coating resins can also be used. According to the knowledge obtained by the inventors of this case so far, solvent-based melamine-cured polyester-based, solvent-based isocyanate-cured polyester-based, and water-jet-type acrylic-based latex are suitable as binding agents. In particular, the following are more suitable. However, these are only examples and are not restricted by them. When it is a solvent-based melamine-hardened polyester, the molecular weight of the polyester resin is preferably 2000 to 30,000 in terms of number average molecular weight, and the weight of the polyester resin is preferably 12 200426025 to -10 to 70C. The addition amount is preferably 5 to 70 parts by mass based on 100 parts by mass of the polyester resin. If the molecular weight of the polyester resin is less than 2000, the processability of the film is reduced, but if it exceeds 3,000, the viscosity of the resin when dissolved in a solvent is too high, which is not suitable. If the Tg of the polyester resin is less than -10t, the film cannot be formed into 5 films, which is not ideal, but if it exceeds 70 ° C, the film will be too hard and the processability will be reduced, which is not desirable. If the added amount of melamine resin is less than 5 parts by mass per 100 parts by mass of polyester, the film will be hardened by curing, which is not suitable. However, if it exceeds% by mass, the film will be too hard and workability will be lowered, which is not suitable. The polyester resins used can be used by ordinary marketers, such as "Byron ™" manufactured by Toyobo Co., Ltd. and "Diesmofen ™" # manufactured by Sumitomo Bayer 10 Uretan. Commercially available melamine resins can also be used, such as Mitsui Tektronix R. Semel ™, McCortTM, Daikoku Ink Chemical Co., Ltd., "BeckmintTM" and "Super Baker" MinTM "and so on. When it is a solvent-based isocyanate-hardened polyester, the molecular weight of the polyester resin is preferably 2000 to 30,000 in terms of number average molecular weight, and the ^ 15 of the polyacetate resin is preferably -10 to 70 ° C. The addition of isocyanate The amount is preferably [Nc0 group equivalent of iso-grade vinegar] / [OH group equivalent pom of polycool resin. When the value of # [NCO-based equivalent of isocyanate and 11-based equivalent of serial lipids] is not knocked to 8 or more than 1.2, the film tends to be unhardened when the film is formed. If the molecular weight of the polyg resin is less than 2000, the processability of the film is reduced, and if it is 3,000 or more, the viscosity of the tree when dissolved in a solvent is too high, which is not ideal. If the acetic acid resin is less than i0c, the film will be formed by the natural method, which is not suitable, and if it exceeds, the film will be too hard, and the processability will be reduced, which is not suitable. Polyacetate resins can be used by ordinary marketers, such as "Baidu TM" manufactured by Toyobo Co., Ltd., and "Diesmofen ™" manufactured by Sumika Bayer Uretan. The isoacid used can also be used by 13 general marketers, such as "Smithur TM", "Desmojul TM" manufactured by Sumitsu Bayer, and "Taguigne" manufactured by Mitsui Takeda Chemical Co., Ltd. Special "etc. The water-dispersible propylene-based latex type can generally be used by a conventional person or a commercially available one. Generally, those with a water-dispersible acrylic latex type may be added with a resin having a high adhesion such as a known epoxy resin. The type and addition of epoxy resin will affect the performance of the coating film, so it must be appropriately selected according to needs. When the water-based resin is a water-dispersible propylene-based resin, the coating workability of the film is high and the problem of atmospheric emissions of volatile organic solvents does not occur. Therefore, it is not necessary to strengthen the exhaust duct of the coating equipment and the combustion of volatile organic solvents. Equipment, etc., so it is more suitable. If the amount of titanium oxide added to the coating film under visible light reflectivity is less than 40 parts by mass relative to 100 parts by mass of the solid part of the binder resin, the reflectivity will be reduced and unfavorable. If it exceeds 150 parts by mass, the reflectivity will not be improved. If it is greatly improved, the processability of the film is reduced, which is not suitable. More preferably, it is 65 to 150 parts by mass based on 100 parts by mass of the binder resin. As the binder resin of the fluorine-containing resin constituting the visible light-reflective top coat film, conventionally known persons may use trifluoroethylene resin, tetrafluoroethylene resin, and vinylidene fluoride. These resins can be used as monomers, or they can be used after being copolymerized with other resin monomers. However, a film with a higher fluorine concentration in the film is more suitable. In particular, those using ethylene trifluoride resins are preferred because of the high fluorine concentration in the film and the ease of coating. In the present invention, the so-called trifluoride ethylene resin refers to a polymer made of a polymer having a repeating unit of -1.

I I

Resin made of FF (but X is a halogen other than hydrogen or fluorine). Specific examples include poly (difluoroethylene). As the binder resin for these fluorine-containing resins, commercially available resins for gas-based coatings, such as Asia The Kefner series of vinylidene fluoride monomers made by Tefina Co., Ltd. and the "lumifluon TM series", a blend of trifluoride vinyl resin and other resins manufactured by Asahi Glass Co., Ltd. When it is a vinylidene fluoride monomer, the β-series and propylene-based resin are generally used in combination. In addition, these resins can be crosslinked by conventionally known crosslinking agents such as isocyanate and melamine resins as needed. Isocyanates can also be used by general marketers, such as “Smithul ™”, “Desmozul TM” manufactured by Sumitsu Bayer Co., Ltd., and “Tower, Giving> Rite” manufactured by Mitsui Takeda Chemical Co., Ltd., etc. Melamine resins can also be used by general marketers, such as "Semel ™", "Mccote ™" manufactured by Mitsui 10 Symantec Corporation, "Beckmin ™" and "Super BeckminTM" manufactured by Dainippon Ink Chemical Co., Ltd. Wait. It is also possible not to use these couplers. However, if the addition amount of the cross-linking agent is less than 20 parts by mass relative to 100 parts by mass of the whole tree month of the fluorine-containing resin, the fluorine concentration in the film will be higher, and the diffuse reflectance of visible light will be further improved. appropriate. When it is 15 trifluoride ethylene tree resin, if the hydroxyl value is less than 10mg-KOH / g, and the addition amount of the cross-linking agent is 20 parts by mass relative to 100 parts by mass of the total resin containing trifluoroethylene resin If it is less than 5%, the diffuse reflectance of visible light can be further improved, which is more ideal. This is because if the hydroxyl group valence is below 10 mg-KOH / g, the film can be cross-linked by a small amount of cross-linking dose, or 20 films can be formed without using a cross-linking agent. Increased fluorine concentration. The visible light-reflective topcoat film is composed of a binder resin of a fluorine-based resin and titanium oxide. This is because the refractive index difference between the binder resin of the fluorine-based resin and the oxide is very large, so visible light is easily in the film. The interface between the binder resin of the fluorine-containing resin and titanium oxide is reflected, and the reflectance is improved. 15 200426025 Therefore, the total surface frequency of the interface between the combination of fluororesin and oxin formed in Yucai is higher, and the higher the secret.若 If the amount of titanium oxide added to the fluororesin is penetrating the film, or because the total area of the interface between the binder resin and titanium oxide2, the visible reflectivity of the film is very low. With the increase in the amount of titanium oxide, the film of light is less expensive, and the area of the film is gradually increased due to the combination of sensible fat and titanium oxide, so the film's inherent properties are high, and the reflectivity of the spring increases. However, the fixed addition amount of titanium oxide + Garys has a peak value. If it is more, the capacity of the oxide is greater than the capacity of the binder resin, and the interface between the binder resin and the titanium oxide ίο 15

On the contrary, it is reduced, and the reflectivity of visible light is reduced. Therefore, the amount of titanium oxide to be added is in a range of 40 to 150 parts by mass relative to the solid portion of the binder resin, in an amount that increases the total area of the interface between the binder resin and titanium oxide. If the amount is more than 40 parts by mass or more, the total area of the interface between the moon and the titanium oxide will decrease and the reflectance will decrease, which is uncomfortable. The addition amount of titanium oxide is preferably 65 ~ 15Q parts by mass, and more preferably 8G ~ 130 parts by weight relative to 1GG ^ 1 parts of the solid portion of the binder resin.

Part 0 The titanium oxide used in the visible light-reflective undercoating film and visible light-reflective topcoating film of the present invention can be generally known, such as "Tai 20 Peike ™" manufactured by Ishihara Industries, and Tika "Chitnicks TM" and so on. However, generally known titanium oxides include rutile type and anatase type, and rutile type is preferred. Compared with the rutile type, the anatase type photocatalyst has a stronger effect, and the film bonding agent may be decomposed. In addition, in order to reduce the photocatalytic effect, improve the dispersibility of pigments and the weatherability of pigments, Al, si, 16 can also be used.

Zr and organic matter are treated with a surface equal to titanium oxide. "The present day ’s visible bribe τ coating film and visible light-reflective top coating film are composed of pure titanium combined with knitting grease. It will be irradiated! • Adding pigments other than titanium oxide to the top coating film, An interface with a small refractive index difference between the additive resin and a pigment other than titanium oxide will cause a decrease in visible light reflectance. However, from the standpoint of appearance and anti-mine, it can also be added to the visible light reflective film if necessary. Pigments and additives other than titanium oxide, such as color pigments, rust preventive pigments, adjusting agents, pigment dispersants, waxes, and matting agents, etc., which are commonly known. 15. Especially if you add pigments under visible light reflection, The pre-coated metal plate has improved purity resistance and is more ideal. It is more ideal if it is a non-road-based anti-fouling pigment. Among the non-chromium-based rust-proof pigments, it is especially used ^ ion-adsorption type dioxide or combined with Ca Ion-adsorption type dioxide and rust-proof acid-based rust-resistant pigments are suitable. 'Because of this, the pre-coated metal plate can have excellent button resistance and press-formability. Furthermore, a combination of Ca ion-adsorption type The type of trimer acid breaking is In addition, in the visible light-reflective undercoat film and visible light-reflective topcoat film, if a matting agent is added to the promoter film as a means to reduce the visible light reflectance of the visible light-reflective film, it is more suitable.

should. As the matting agent, conventionally known matting agents can be used, and silicon dioxide I, a silicon dioxide-based pigment, and the like are known. / When the visible light reflective undercoating film and the visible light reflective overcoating film are laminated on one surface of the metal plate, if the heat absorbing film is coated on the other surface, the visible light generated in the electronic device will be brighter. The details of the reason are unknown, but the big = 17 200426025 is because the heat (infrared rays) emitted by the lighting fixture and the device that emits the light signal is absorbed by the heat-absorbing film, which makes up the phenomenon in the light-emitting body, which in turn makes The amount of visible light also increases and becomes brighter. Furthermore, in addition to these phenomena, once heat is absorbed from the heat-absorbing film by the pre-coated metal plate of the present invention, the temperature of the pre-coated metal plate will rise, and the temperature of the visible light reflective film will also rise. Therefore, The refractive index of the binder resin of the visible light reflective film decreases, the refractive index difference between the added pigments such as titanium oxide and the binder resin increases, and it also has the effect of increasing the visible light reflectance of the visible light reflective film. The brightness will be brighter. 10 In addition, because the heat generated in the machine is absorbed by the heat-absorbing film, the temperature in the machine is lowered, and the circuits such as the control board installed in the machine can be operated efficiently, and the current loss required for light emission is reduced to reduce the amount of light. Increase, this point is also tolerated as one of the reasons for the increase in brightness. A configuration example of a pre-coated metal plate for a reflective plate provided with a heat-absorptive film according to the present invention is shown in FIG. 2. The system 15 has a structure in which one surface of the metal plate 1 is covered with a visible-light reflective upper coating film 2 and a visible light-reflective lower coating film 3, and the other surface is covered with a heat-absorbing film 4. Here, the diffuse reflectance of the visible light-reflective film on the pre-coated metal plate of the present invention in visible light with a wavelength of 400 to 700 nm is preferably 0.7 or more. If it is less than 0.7, the visible light reflection function cannot be improved, and the light from the lighting and light emitting body will become dark, so it is not suitable. It is more preferable that the diffuse reflectance of visible light at 555 nm be 0.8 or more. This is because, in the wavelength range of visible light, the wavelength range known to impart brightness is generally 550 to 555 nm. The diffuse reflectance of the present invention refers to the spectral solid angle reflectance described in JIS Z 8722.2 (2), and is also referred to as the spectral reflectance. The measurement method is based on JIS Z 8722.4. A visible light reflective pigment can be added to the film to increase the diffuse reflectance of the visible light reflective film. The total emissivity of the heat-absorbing film at a specific temperature of 80 ° C to 200 ° C and a wavenumber of 600 to SOOOcrrT1 should be 0.70 or more. Since the influence of heat from radiation in the wave number range of less than 600 cm-1 or more than 3000 cm · 1 is very small, the emissivity of radiation containing such wave number range is not suitable. In addition, if the total emissivity is less than 0.7, the heat absorption function will be reduced. Here, the general knowledge about heat absorption is described below. It is known that heat 10 is part of the electromagnetic waves emitted by an object. Once the thermal radiation is incident on the object, part of it will be reflected, part of it will be penetrated, and the remaining part will be absorbed (such as "The Basics of Mechanical Engineering" by Nishikawa and Fujita) Lecture on Electrical Engineering ", Issue: Institute of Science and Technology). When the thermal radiation is incident on the metal plate, the thermal radiation hardly penetrates, so the thermal radiation is either reflected or absorbed. 15 Here, when the thermal radiation generated from the lighting fixture and the device that emits light signals is incident on the surface of the reflecting plate, if most of the incident thermal radiation is reflected, the temperature of the machine rises. On the other hand, if the thermal radiation is mostly on the reflecting plate The surface is absorbed and the temperature of the machine drops. As a method for investigating the reflectance of thermal radiation incident on the surface of a metal plate, etc., a reflection method using an infrared spectrophotometer is known. However, when measuring by this method, if the surface roughness of the metal plate is relatively coarse, The thermal radiation will be irregularly reflected, making it difficult to obtain a highly accurate absorption rate. According to Kirchhoff's rule about thermal reflection, the absorption rate and emissivity of an object are the same at a certain temperature (such as "Mechanical Fundamentals of Mechanical Engineering 19 200426025 Block Electric Engineering" by Nishikawa and Fujita, (Release: Institute of Science and Technology). In order to increase the emissivity of the heat-absorbing film, it is preferable to contain 10 to 150 parts by mass of the heat-absorbing pigment with respect to 100 parts by mass of the solid portion of the binder of the film. If the heat-absorbing pigment is less than 10 parts by mass, the emissivity tends to be less than 0.7, but if it exceeds 150 parts by mass, the storage stability of the film coating is poor, which is not desirable. The heat-absorptive pigments can be generally known heat-absorptive pigments, such as benzene 10 amine black, polymethylene dye, triazole dye amine salt, cyanine dye or metal complex thereof, anthraquinone, The phytocyanine (phthalocyanine) system, iron oxide and Shifansi. Among these conventionally known heat-absorbing pigments, it is more desirable to break infrared rays because they can emit a wide range of wave numbers. this

15 20 In addition, carbon can be carbon black, coal, graphite and other commonly known carbons. In addition, if the added carbon is carbon having a particle size of less than 0.1 μm (hereinafter referred to as “small-size carbon and carbon having a particle size of 0.1 μm or more and less than 30 μΓη (hereinafter referred to as“ large-size carbon ”) It is better to mix and add the following amount, that is, compared with the mass fraction of the combined body part, the small particle size carbon is the shoulder weight part and the large particle size carbon is 14 mass parts, and the large particle size carbon is The total amount of carbon with small particle size is 10 ~ 15. The lower limit of the particle size of small particle size carbon is not particularly limited, but if the upper limit is above, the gap between carbon and carbon is likely to occur and small particles cannot be exerted. The seven uses of carbon are not bad. If the added amount of small particle size is less than 1 part by mass, there are 4 metal plates with poor concealment effect and poor heat absorption c * < y Wu, so it is not appropriate; warehouse If it exceeds 2G parts by mass, the viscosity of the coating solution will increase, which may cause gelation over time and is not good. If the particle size of the large-size carbon is less than ^ handsome, it is beneficial to use the large-size carbon The effect of bamboo is the same as that of small-sized carbon, which is not ideal. If the particle size of large-sized carbon is on Qingyi, it is feared that

20 200426025 ίο 15 The coating properties of the coating liquid with this large particle size carbon will be reduced, or the appearance of the film after coating will be deteriorated, which is also not ideal. If the added amount of the large particle size carbon is less than the known amount, there is a risk of '' and poor absorption, but if it exceeds 14q parts by mass, the film will become brittle ', which may degrade the workability of rhenium, which is not suitable. In addition, if the total added amount of small particle size carbon and large particle size carbon is less than 1 Gf parts, the heat absorption may be poor, and if it exceeds 15 Gf parts, chm will be brittle, in addition to processability. Poor external coating solution will increase viscosity and deteriorate coating workability, but it is not ideal. In addition to the heat-absorbing pigment in the heat-absorbing film, if the conductive metal powder is contained in an amount of 5 parts by mass relative to 100 parts by mass of the solid part of the binder as the conductive pigment, the pre-coated metal sheet of the present invention can be made conductive. Sexuality is very appropriate. If conductivity is provided, the grounding property of the reflecting plate can be ensured, and the reflecting plate is less prone to static electricity and less likely to adhere to dust, which is more desirable. If the addition amount of the metal powder is less than 1 part by mass, the conductivity imparting effect is lacking, and if it exceeds 50 parts by mass, the processability of the film is lowered, which is not good. The type of metal powder is not particularly limited, but conductive metal powders such as aluminum, nickel, and stainless steel can be used:

20 Copper, silver, magnesium, zinc and tin. In addition, the shape of the metal powder is not specifically defined, but it may be necessary to select it appropriately because the shape may cause a difference in conductivity or hinder heat absorption. As far as the inventors of the present invention know, it is more suitable to use a combination of flaky metal and chain metal. If the chain metal is in the film, the area of the reflected heat is reduced, and it is more difficult to hinder heat absorption, which is more suitable. However, if only the chain metal 'is used, there is a possibility that the conductivity is not good, and therefore it is preferable to use a combination of a sheet metal and a chain metal. In addition, if the mass ratio of the flake metal / chain metal is 0.1 to 6 ', it is more suitable because both heat absorption and conductivity are good. Flake

The larger the area of the metal's reflection of heat in the film 'is likely to hinder heat absorption. 21 200426025 Therefore, if the mass ratio of the flake metal / chain metal is less than 0.1, the conductivity is not good, but if it exceeds 6, the heat absorption may be poor. In addition, as the aforementioned metal, compared with other metal pigments, nickel has a property that it is not easy to hinder the heat absorption of the heat-absorbing pigment, which is very suitable. · 5 The binder resin constituting the heat-absorbing film can be the same as the binder resin constituting the visible light-reflective undercoat film. In addition to titanium dioxide, heat-absorbing pigments, and conductive pigments, visible-light-reflective topcoat films, visible-light-reflective undercoat films, and heat-absorbing films can be used in combination with coloring pigments, rust-proof pigments, and rust-proof as required. Agent. However, if Xin 10 wants to increase the visible light reflectance of the visible light reflective film, only the film composition of the binder resin and titanium oxide can increase the diffuse reflectance of visible light, which is more suitable. If a pigment other than titanium oxide is added to the visible light reflective film, an interface having a small difference in refractive index will occur between the binder resin and the pigment other than titanium oxide, thereby reducing the visible light diffuse reflectance of the film. However, from the standpoint of appearance and rust prevention, if necessary, pigments other than hafnium oxide may be added to the visible light reflecting film. Examples of coloring pigments include zinc oxide (Zn0), zirconium oxide (ZrO2), carbonic acid (CaC03), barium sulfate (BaS04), alumina (Αία3), kaolin, and iron oxide (Fe203). ) And other inorganic pigments and organic pigments. Antirust pigments and rust inhibitors can include commonly known chromium-based rust-proof pigments such as chromic acid and chromic acid, and generally known non-chrome-based rust-proof pigments and rust-proofing agents, such as zinc phosphate and sub-filling acid. Phosphoric acid | g, phosphorous acid salt, molybdate, molybdate phosphate, vanadate / phosphoric acid mixed pigment, silicon dioxide, and calcium dioxide known as calcium 22 200426025 Wait. Especially when the base material of the pre-coated metal sheet of the present invention is a perishable metal such as a steel plate or a mineral-coated steel sheet, the anti-corrosive pigment and the anti-rust agent can be added to improve the corrosion resistance of the pre-coated metal sheet of the present invention. The effect is more ideal. Considering the environmental issues in recent years, at 5 o'clock, non-chrome antirust pigments and antirust agents are more effective. These non-chrome antirust pigments and antirust agents can be used as reagents or commercially available products. Examples of commercially available anti-embroidery pigments include zinc phosphate-based rust-proof pigments "EXPERT ™ -NP500" and "EXPERT'NP53〇" manufactured by Toho Pigment Co., Ltd., and zinc phosphite-based rust-proof pigments manufactured by Toho Paint Co., Ltd. EXPERTTM_Npi5 ( ) 〇 ", 10" EXPERTTM-NP1530 "," EXPERTTM-NP1600 "and

EXPERT -NPΠ00 ", Tripoly Phosphate Junction" K-wihTE Series "made by Tika Co., Molybdate Pigments and Dipate Pigments" SHER-WHITE Series "made by SHERWIN Willams, Ayerero, Japan Gas phase dioxide “AerOsiltm series” manufactured by Jill and Dixa, colloidal stone sunset “Snowatex top series” manufactured by Sanka Chemical Industry Co., Ltd. Adsorption-type stone dioxide "Siltierx ™ series" and so on. These anti-mineral pigments can also be used in combination. In addition, among these non-chrome antirust pigments, it is particularly suitable to use Ca ion adsorption type silica dioxide alone or to use raccoon adsorption type silica and discite rust prevention pigments. The coated metal plate has excellent residual resistance and press formability. Moreover, the type of fluorene ion adsorption type silica and aluminum tripolyphosphate is more preferable. These coloring pigments, rust preventive pigments and rust preventives will make different film properties such as emissivity, processability, appearance, and survivability due to the different types, addition amounts and grains. Choose it appropriately. 23 200426025 The heat-absorbing film can be added with conventionally known adjusting agents, pigment dispersants, matting agents, and matting agents as needed. However, the visible light-reflective undercoating film and the visible light-reflective topcoating film are ideally designed to increase the reflectivity of visible light by adding a car without these additives. However, from the viewpoint of agricultural workability and coating film, it is possible to add these additives to the visible light reflective coating film and visible light reflective coating film when necessary. The type and amount of these additives are not particularly limited, but may be appropriately selected according to need. Among them, f is effective in improving the formability of the pre-determined metal plate of the present invention in Carnegie and preventing damage to the heat-absorbing film. In addition, depending on the use of the pre-coated metal plate for a reflective plate of the present invention, the visible reflectance of the reflective plate is preferably low. If the reflectivity of the reflector is south, the reflected light will not diffuse and only brighten at a specific place, or an image of a light source such as a light bulb or fluorescent lamp will be reflected on the surface of the reflector. For example, if a reflecting plate of a liquid crystal television or the like does not diffuse and reflect light more evenly and then reaches the liquid crystal display, the image of a difficult-to-crystal screen may cause the brightness to be darkened. Therefore, the reflecting plate of this application will sometimes require lower Visible light reflectance. It is known that the normal reflectance of visible light is inversely related to the gloss of the surface of the visible light reflective film. The lower the gloss, the lower the normal reflectance. Therefore, as a means for reducing the visible light reflectance of the visible light reflective film, it is more suitable to add a matting agent to the visible light reflectance 胄 · 20. Matting agents can be used by ordinary people. Dioxide. Silicon dioxide or silicon dioxide pigments are very effective. In silicon dioxide pigments, if stone dioxide with metal ions attached is used, the surname resistance is also improved. And more suitable. Silica dioxide can be used by ordinary people, Japan ’s Ayer Rogill and Dixa ’s fumed silica “AERsiltm series” and Nissan 24 200426025 ίο 15 20 Huazishe clothing colloidal silica "Nuo ^ ^ m㈣ H queue with metal ions" search. For the absorption ^ —, Ca ion-adsorbed silicon dioxide manufactured by Grace Co., Ltd. " Miluo &#Siltiers TM Series " and the like can be used. In addition, the corpse does not need to have low visible light reflectance and low gloss. Then, it is better to use a combination of lipids and oxidants to diffuse the reflectance rather than south, and it is more ideal. In order to form a visible-light reflective lower coating film and a heat-absorbing film on the surface of a metal plate, and to form a visible-light reflective upper coating film on the surface of the visible-light reflective upper coating film, a film component containing a binding agent can be prepared as -Coating after a conventional coating type. For example, there can be mentioned: a water-soluble paint that dissolves tree silk in a solvent, a water-based paint that disperses a latexed resin in water and the like, a powder paint that pulverizes a resin and powders, and a powder that has been pulverized and powdered. ⑽ powder coatings in which resins are dispersed in water, ultraviolet (υν) hardening coatings, electron beam (EB) hardening coatings, film laminates made of resin in a film form and then pasted, and coating after melting the resin Type of cloth, etc. Any coating method is not particularly limited, and conventionally known coating methods can be adopted, such as roller coating, roller curtain coating (curtain flow coating), curtain flow coating (curtain flow coating), and air jet Painting, airless spray painting, bristle painting, and die coater painting. It is particularly suitable to perform coating by roller coating, roller curtain coating, curtain flow coating, and die coater coating because the processing efficiency can be continuously improved. A promoter film may also be provided in order to impart anti-mineralization and concealment to the substrate of the visible-reflective undercoating film and heat-absorbing film. The promoter film may be a conventionally known binder, rust preventive pigment, and coloring pigment. Can also be used

25 200426025 Commercially available. The aforementioned binders for visible light reflecting films and heat absorbing films, rust preventive pigments and colored pigments can also be used. In particular, if the promoter film used for the base of the visible-light-reflective undercoating film contains a visible light reflecting pigment (preferably titanium oxide) of 40 to 250 parts by mass relative to 100 parts by mass of the solid portion of the binder, the It is more suitable to increase the diffuse reflectance of the visible light reflective film. The film thickness of the promoter is not particularly specified, but it should be 丨 ~ fairy talons. If it is not full, the function of the promoter cannot be exhibited (to ensure concealment and marginal resistance, exceeding 40_ may reduce the coating workability. The binder resin used for the promoter ίο can be used with secret light The resin of the reflective film and the heat-absorptive film is the same. In addition, the same as the visible light-reflective film and the heat-absorptive film can be added to the promoter as needed—colored acoustic materials, anti-rust pigments, Adjusting agents, pigment dispersants, soils and matting agents, etc. In particular, if the promoter is added with a force of 0 to prevent rust, ^ rust, it is more ideal for the corrosion resistance of the pre-coated metal plate & 15 μ. It is more ideal for non-chrome 糸 antirust pigments. Non-chrome 糸 anti-fine silicon or combined with Ca ion _ dioxygen ^ silicon and phosphoric acid-based rust preventive pigments are suitable, so that it can be pre-coated with metal The plate is more resistant to pureness and press-formability with a cricket type II. .. The type of sheep silicon and aluminum tripolyphosphate is better. In addition, the coated promoter can be used to make visible light. When the base of the reflective film is visible, add matting to the promoter film. The agent is a method with low emissivity P. If the matting agent is known, dioxin is known as the matting agent. The matting agent can be used in general, and the pre-coated gold visible light anti-secret film and heat barrier of the present invention. On the surface of the material, on the surface, in order to improve the adhesiveness of the film, it is more ideal if 26 200426025 fine > add coating ϋ treatment. The pre-treatment of coating can be used by ordinary people, such as coating Cloth chromate treatment, electrolytic chromate treatment, zinc phosphate treatment, oxidation system treatment and titanium oxide system treatment. In addition, in recent years, chromate-free pretreatments using organic compounds as substrates have also been developed. The burden caused by the environment is more suitable if resin-based chromate-free pretreatment is used. Examples of chromate-free pretreatment based on organic compounds such as resin can be listed in: Kaiping Publication No. 9-828291, JP-A Publication No. 10-251509, JP-A Publication No. 10-337530, JP-A Publication No. 2000-17466, JP-A Publication No. 248385, JP-A Publication No. 2000-273659, JP-A Publication 2000_282252, Japanese Patent Laid-Open No. 2000-265282, In general, technologies such as 2000_167482 and Japanese Patent Laid-Open No. 2000-266〇8 丨, in general, conventional technologies can be used in addition to the above. Because of the type of pretreatment and the amount of adhesion The adhesiveness of the heat-absorbing film and the surname resistance of the pre-coated metal plate are also very different, so it must be appropriately selected as required. The metal base material of the pre-coated metal plate of the present invention can be used in general The material can also be an alloy. For example, steel plates, nameplates, titanium plates, and copper plates can be listed. The surface of these materials can also be plated. The types of plating can be aluminum plating, copper plating, and Nickel plating, etc. In the case of steel plates, cold-rolled 20 steel plates, hot-rolled steel plates, zinc melt ore-covered steel plates, dipole clock steel plates, melt-fusion metallized gold-plated steel plates, non-gold-plated steel plates, and non-gold alloyed forging Steel plates and stainless steel plates are generally known steel plates and plated steel plates. Furthermore, if the roughness of the surface of the metal plate or the metal plate which has been deposited is ㈣5 to 1 m in terms of Ra, the diffuse reflectance can be made higher and more suitable. 27 200426025 When visible light is incident on the surface of the visible light reflective film, visible light that penetrates because the visible light reflective film fails to reflect completely will be reflected on the surface of the base material under the film. Here, it is found that if the surface roughness of the base material is much smaller than the wavelength of visible light (in general, the wavelength range of visible light is called ~ 78Gnm), the visible light incident on the surface of the base material is difficult to diffuse and reflect. Easy for regular reflection. On the other hand, when the surface roughness of the base material is much larger than the wavelength of visible light, the incident light incident on the surface of the base material will penetrate the concave-convex gap on the surface of the base material and be easily absorbed by the base material. Therefore, if the Ra of these metal plates or plated metal plates of the base material is less than 0.05 μm, visible light will be difficult to diffuse and reflect, which is not suitable. Conversely, if Ra exceeds 1.8 μm, visible light that is not reflected and penetrated by the visible light reflective film reaches the metal plates or plated metal plates of the base material, and the visible light is easily absorbed on the surface of the base material. Is also inappropriate. These metal plates can be subjected to general treatments such as hot water cleaning, alkali degreasing, and acid cleaning when pre-coating treatment is applied. If the metal base material of the pre-coated metal plate is a steel plate or a plated steel plate, the formability of the pre-coated metal plate is improved, which is more suitable. If the pre-coated metal plate of the present invention is formed into a reflective plate to improve the manufacturing efficiency of the reflective plate, it is very suitable. The force sigma method of the reflecting plate can adopt a conventionally known processing method. For example, processing methods such as perforation processing, bending processing, twisting processing, protrusion processing, and roll forming. In addition, the electric and electronic equipment equipped with the pre-coated metal plate of the present invention has a high visible light diffusion reflectance and good heat absorption due to the pre-coated metal plate, which can make the brightness of lighting and light signals brighter, and The lowering of the temperature inside the machine can make the circuit of the control board and the like installed in the machine operate efficiently and safely. Furthermore, such electrical and electronic equipment can be exemplified by Zhaoming crying AV equipment, mobile equipment, plasma display panels, and LCD televisions, etc., Example 1 5 methods of visible light-reflective undercoating and topcoating used in experiments The details are as follows. Commercially available organic solvent-soluble / amorphous polylysine (hereinafter referred to as polyester resin) "ByronTM GK14〇" (tree average score; amount: 13000, Tg: 2 (TC ) Dissolved in an organic solvent (a mixture of Solbesol® and cyclohexane in a mass ratio of 1: 1). 10 Next, a polyester resin melted in an organic solvent is added to a solid relative to the polyester resin. Part of 100 parts by mass of 15 parts by mass of commercially available hexa-methylaminomethylated dihydrate gas amine ("Semel TM 3" manufactured by Nikai Symantec Corporation), and Mitsui, a commercially available acidic catalyst, is further added. 0.5 parts by mass of "Katelister 6003B" manufactured by Symantec Corporation was stirred to prepare a melamine-hardened poly 15-ester-based clear coating (hereinafter, this coating is referred to as a polyester / melamine-based coating).

It is also more commercially available as "Rumifluron TM LF552" (number average molecular weight: 12,000, hydroxyl valence: 52 mg-KOH / g, manufactured by Asahi Glass Co., Ltd.).

Tg: 20 ° C) in combination with a commercially available block isocyanate based on HDI (hexamethylene diisocyanate) ("Smithul ™ 20 BL3175" manufactured by Sumitsu Bayer Uretan), After [NCO group equivalent of isocyanate] / [OH group equivalent of polyester resin] = 1.0, a reaction catalyst "TK-1" manufactured by Mitsui Takeda Chemical Co., Ltd. was added in an amount of 0.05% based on the resin solid mass. Fluorine-based clear paint (hereinafter referred to as fluorine-based A). Furthermore, it is not included in the commercially available "Lumi 29 200426025 FluonTM LF810Y" (number average molecular weight: 12000, hydroxyl valence 9mg-KOH / g, Tg: 45 ° C) manufactured by Asahi Glass Co., Ltd., a commercially available trifluoride resin. Any cross-linking agent is added to directly obtain a fluorine-based clear coating (hereinafter referred to as fluorine-based B).

Next, the produced clear coating was added with an oxide 5 titanium "Taipei CR95" manufactured by Ishihara Sangyo Co., and then stirred to obtain a visible light reflective lower coating and a top coating. If necessary, you can add "AEROSIL ™ 300" manufactured by Ayeriro Gil Company of Japan or Ca ion-adsorbed titanium dioxide "Siltierx ™ C303" manufactured by GRACE. Details of the types of clear coatings used and the amount of titanium oxide added are given in Table 1. 10 Table 1 Coating No. Resin Titanium Oxide Addition (parts by mass) Silicon dioxide pigment type parts by mass type species parts by mass Coating 1-1 Poly 8 Purpose / Melamine Type 100 20 — One Coating 1-2 Poly West Purpose / Melamine Type 100 65 — — Coating 1-3 Polyester / Melamine 100 100 — — Coating 1-4 Polyester / Melamine 100 130 — — Coating 1-5 Polyester / Melamine 100 160 — One Coating 1-6 Polyester / Melamine 100 200 — — Coating 1-7 Polyester / Melamine 100 100 Silicon dioxide 3 Coating 1-8 Polyacetate / Melamine 100 80 Ca Fossilate 20 Coating 1-9 Polyester / Melamine 100 200 Silicon dioxide 1 Coating 1-10 Fluorine A 100 20 — — Coating 1-11 Gas A 100 65 — — Coating 1-12 Fluoro A 100 80 — — Coating 1-13 Gas A 100 100 — — Coating 1 -14 Fluorine A 100 130 — — Coating 1-15 Fluorine A 100 160 — — Coating 1-16 Fluorine A 100 200 — — Coating 1-17 Gas A 100 100 Silicon dioxide 3 Coating 1-18 Random A 100 200 Silicon dioxide 3 Coating 1-19 Fluorine B 100 100 — —

The preparation method of the pre-coated metal plate used for the experiment is described in detail in

Herein, a metal plate having a thickness of 0.6 mm is placed in a 60% aqueous solution in which a commercially available degreasing agent (Japan Par 30 200426025 "Karijin Co., Ltd." FC4336 ") is diluted to a concentration of 2% by mass for degreasing, and washed with water. After drying. Next, the degreased metal plate was coated with an addition treatment liquid by a roller coater, and then dried with hot air at a temperature of 60 ° C. 5 This experiment uses the following metal plates. In addition, in order to make the thickness of the original plates of these metal plates approximately the same, the thickness is adjusted by rolling with a calender roll. CR: a commercially available cold-rolled steel sheet (material: SPCE (JIS G3141), surface roughness Ra · 1.0 μm). EG: A commercially available electroplated steel sheet (amount of adhesion ·· single surface 20 § / 1112; material: 10 SECE (JIS G3313); surface roughness Ra: 0.9 μm). AL: Commercially available pure aluminum plate (Material: 1100 (JIS Η4000); Surface roughness Ra: 0.8 μm) ○ In this experiment, the following metal plate was used. In addition, in order to make the thickness of the original plates of these metal plates approximately the same, the thickness is adjusted by rolling with a calender roll. 15 EG: a commercially available electroplated steel sheet (zinc adhesion amount: 20g / m2 on one side; material: SECE (JIS G3313); surface roughness Ra: 0.9 μηι). AL sheet: a commercially available aluminum plated steel sheet (aluminum adhesion amount: 60 g / m2 on one side; material: SALE (JIS G3314); surface roughness Ra: 1.0 μm). GL: a commercially available 55% aluminum-zinc plated steel plate (plating adhesion: 20 90 g / m2 on one side; material: SGLCD (JIS G332l); surface roughness: 9).

Al-Mg: a commercially available Al-Mg-based aluminum alloy plate (material: 5082 (JIS H4000); surface roughness] ^ ...). This experiment uses a commercially available chromate-free addition during the addition treatment. The name of the treatment is "CT-E300" (hereinafter referred to as chromate-free treatment) manufactured by Pakkale Crystal Co., Ltd. 31 200426025 The addition treatment is to treat both sides of the metal plate with a roller coater, and then dry it to a temperature of 60t. The adhesion amount of the additive treatment is 150 mg / m2 as the total film amount. In addition, the surface of the coating under visible light reactivity is coated with a coating roller ^ 5 on a metal plate to which the addition treatment is applied. Apply on one side and on the other side _ Japan FINE-C0ATING's universal inner coating fli〇〇hq, then = and use a hot air induction heating furnace to dry and harden. Drying and hardening conditions are based on reaching the plate temperature (PMT) It is 2HTC. The coating contained in Table i which is the visible light reflective topcoat is coated on the surface coated with «10 coating film with visible light reflectance by a roller coater, and the induction heating furnace is based on the wind. It is allowed to dry and harden. The dry hardening condition is 23 (rc.) Based on the reaching plate temperature (PMT). The details of (PCM) are shown in Table 2. In addition, the film thickness of each film layer in Table 2 is the film thickness after drying. In addition, the film thickness of the inner coating is 5 μm based on the dry film thickness. In addition, the table PCM-I-27 ~ 30 and PCM-I-35 in 2 are difficult to apply by roller coating because the film thickness is greater than I5. Therefore, under these visible light reflections, the k film and "7 see light reflection The pre-coating metal film is coated with a coating bar (bar c 3 times) to obtain a pre-coated metal plate with the film thickness. 3232260260 Table 2 PCM-No. Visible light reflection of the coating film under visible light reflectivity of the original plate Preparing Coatings for Coatings Film Type (μιη) Coating Type Film Thickness (μιη) PCM-I-1 EG Coating 1-2 10 Coating 1-13 20-PCM-I-2 EG Coating 1-3 10 Coating 1- 13 20 — PCM-I-3 EG Coating 1-4 10 Coating 1-13 20 — PCM-I-4 EG Coating 1-7 10 Coating 1-13 20 — PCM-I-5 EG Coating 1-8 10 Coating 1 -13 20 — PCM-I-6 EG Coating 1-3 10 Coating 1-11 20 — PCM-I-7 EG Coating 1-3 10 Coating 1-12 20-PCM-I-8 EG Coating 1-3 10 Coating 1-14 20-PCM-I-9 EG Coating 1_7 10 Coating 1-17 20-PCM-I-10 EG Coating 1-8 10 Coating 1-17 20 — PCM-I-11 EG Coating 1-3 10 Coating 1-17 20-PCM-I-12 EG Coating 1-3 5 Coating 1-13 20 — PCM-I-13 EG Coating 1-3 15 Coating 1-13 20 — PCM-I-14 EG Coating 1-3 25 Coating 1-13 20-PCM-I-15 EG Coating 1-3 10 Coating 1-13 15-PCM-I-16 EG Coating 1-3 10 Coating 1-13 25 — PCM-I-17 EG Coating 1-13 10 Coating 1-13 20 — PCM-I-18 CR Coating 1-3 10 Coating 1-13 20 — PCM-M9 AL Coating 1-3 10 Coating 1-13 20 — PCM-I-20 AL-Mg Coating 1-3 10 Coating 1-13 20 — PCM-I-21 EG Coating 1-3 10 Coating 1-19 20 — PCM-I-22 EG Coating 1-3 15 Coating 1 -13 40 — PCM-I-23 EG Coating 1-1 10 Coating 1-10 20-PCM-I-24 EG Coating 1-5 10 Coating 1-15 20-PCM-I-25 EG Coating 1-6 10 Coating 1-16 20-PCM-I-26 EG Coating 1-9 10 Coating 1-18 20-PCM-I-27 EG Coating 1-9 80 Coating 1-18 20 Do not apply PCM-I- by roller coater 28 EG Coating 1-9 80 Coating 1-9 20 Do not apply PCM-I-29 AL by roller applicator Coating 1-9 80 Dope 1-18 20 Do not apply PCM-I-30 AL by roller applicator Coatings 1-9 80 Coatings 1-9 20 Do not apply PCM-I-31 EG Coatings 1-3 5 by roller coater 1-3 15-PCM-I-32 EG Coating 1-3 1 Coating 1-13 5 — PCM-I-33 EG Coating 1-3 1 Coating 1-13 20 — PCM Small 34 EG Coating 1-3 10 Coating 1-13 3 — PCM-I-35 EG Coating 1-3 50 Coating 1-13 50 Do not apply PCM-I-36 EG No Bottom Coating Coating by Roller Applicator 1-12 10 — Prepared for Evaluation tests of pre-coated metal plates are detailed below. 1) Measure the visible light diffuse reflectance of the visible light reflective film. 5 Use the integrating sphere reflection accessory installed on the UV265 spectrophotometer manufactured by Shimadzu Corporation to measure the pre-coated metal plate produced. The diffuse reflectance of visible light with a wavelength of 400 to 700 nm on the surface of the reflective film, and the integral value of the obtained wavelength-reflectance curve was obtained. In addition, the diffuse reflectance of visible light with a wavelength of 555 nm that can best provide brightness was also determined. In addition, the reference value is a barium sulfate manufactured by Merck, a white standard product 5 (DIN5033) of the German DIN standard, so that the diffuse reflectance is 1.00, and then the diffuse reflectance of each film is obtained. 2) Gloss of visible light reflective film Based on JIS K 5400.7.6, the angle of incidence and the angle of light reception are each 60. , The specular gloss of the surface of the visible light reflective film of the pre-coated metal plate. 10 3) Measurement of illuminance of lighting equipment Figure 3 shows the outline of the experimental device. A commercially available fluorescent lamp lighting device 12 was installed in a wooden box ^, and a commercially available light meter sensor 14 was installed at a distance of 30 cm from the fluorescent lamp 13 to measure the illuminance. In addition, with regard to the fluorescent lamp lighting device 12, the attached reflecting plate 15 (hereinafter referred to as the existing reflecting plate 15 15) is removed, and various pre-coated metal plates manufactured are used to make the same shape as the existing reflecting plate 15 The reflection plate 15 was measured for the illuminance when the existing reflection plate 15 was mounted and when the manufactured reflection plate 15 was mounted. Next, the illuminance at the time of measurement with the existing reflection plate 5 and the illuminance at the time of measurement with the prepared reflection plate 15 of the pre-coated metal plate were compared and evaluated as follows. In this experiment, a 16-watt fluorescent lamp with a 16-shaped illuminator was used. When the illuminance change rate is 110% or more: 〇 When the illuminance change rate is 103% or more and less than 110%: △

When the change rate of illuminance is less than 103%: X In addition, the change rate of illuminance is defined as {[((the illuminance of the pre-coated metal plate produced 34 200426025 illuminating plate) / (the illuminance of the existing reflecting plate)] χ 100}. 4) Bending test of pre-coated metal sheet (workability) The pre-coated metal sheet obtained was subjected to close bending at 180 ° in an atmosphere of 20 ° C, and the damage state of the film at the processed part was observed with a magnifying glass. The following 5 criteria were used to evaluate workability. In addition, in this experiment, when the test piece was bent, three pieces of the same thickness as the pre-coated metal plate to be evaluated were placed on the inner side to perform tight bending, and 3T bending was performed. When the film is completely free of damage: 〇 When the film is partially damaged: △

10 When the processing part of the film is severely damaged: X 5) The twisting formability of the pre-coated metal plate is 50mm punch diameter, punch shoulder R (punch shoulder radius) 3cm and twisting The cylinder twist test was performed under the conditions of 2.1. In the cylinder twist test, a pressure test was performed without applying the rolling oil 15 to the surface of the pre-coated metal plate, and the surface of the visible light reflecting film was made outside the cylinder to perform the experiment. The formability of the pre-coated metal plate was evaluated as follows. The pre-coated metal sheet was not broken and twisted to the end when it was being formed, and the film was not damaged visually: 〇The pre-coated metal sheet was not cracked during the formation of the base metal, but there was no visual observation of the addition of 20 parts When obvious film peeling or film damage: △

Regardless of whether the base metal of the pre-coated metal sheet is broken during the forming process, when obvious film peeling or film damage is found visually: X 6) Corrosion resistance of the pre-coated metal sheet The method for evaluating the corrosion resistance of the surface is described below. 35 200426025 The visible light-reflective film surface of the pre-coated metal plate was cut, and then the salt spray test was carried out by the method of JIS K 5400.9.1. The saline was sprayed on the side of the test piece with a transverse cut. Let the experiment time be 120 hours. Next, the film swelling width from the surface-side incision was measured. It was evaluated as 0 when the swelling width of the incision was less than 5 mm on one side, and △ when the swelling width of the incision was less than 5 mm on one side. X at 5mm. 7) Conductivity test of heat-absorbing film of pre-coated metal body The conductivity of the heat-absorbing film of the pre-coated metal plate produced was measured. The measurement method is to measure the surface resistivity of a metal plate using the four-terminal method of "Restor_EP / MCP-T360" made by Mitsui Chemicals Co., Ltd. 10 "Loresta_EP / MCP-T360" and evaluate it according to the following standards. When the resistivity is less than 0.ΐχ 10_2Ω: 〇 When the resistivity is more than 0 · 1χ HT2 and less than 1.0 × 10-%: △

When the resistivity is more than 1 · 0χ Η ^ Ω: X 15 is evaluated on the prepared pre-coated metal plate. The bending test of the film was performed only on the surface of the visible light reflecting film. The evaluation results are shown in Table 3 〇 36 200426025 Table 3 PCM No. Diffusion reflectance (400 ~ 700nm) Diffusion reflectance (555nm) Gloss illuminance Workability Twisting formability Corrosiveness PCM-I-1 0.89 0.92 90.3 〇 〇〇Δ PCM-I-2 0.90 0.93 90.3 〇〇〇 △ PCM-I-3 0.90 0.93 90.3 〇〇〇 △ Example PCM-I-4 0.90 0.93 90.3 〇〇〇Δ PCM-I-5 0.90 0.93 90.3 〇〇〇Δ PCM-I-6 0.87 0.91 95.2 〇〇〇Δ PCM-I-8 0.88 0.92 93.1 〇〇〇 △ PCM-I-8 0.88 0.92 90.0 〇〇 △ PCM-I-9 0.88 0.91 48.2 〇〇 〇Δ PCM-I-10 0.88 0.91 47.1 〇〇〇〇PCM-I-11 0.89 0.92 50.1 〇〇〇Δ PCM-I-12 0.86 0.88 90.1 Δ 〇〇Δ PCM-I-13 0.87 0.90 90.0 Δ 〇〇Δ PCM-I-14 0.92 0.95 90.2 〇〇〇Δ PCM-I-15 0.87 0.90 90.3 Δ〇〇Δ PCM-I-16 0.92 0.94 90.4 〇〇〇Δ PCM-I-17 0.92 0.94 90.2 〇〇〇Δ PCM- I-18 0.89 0.91 90.3 〇〇〇Δ PCM-I-19 0.91 0.94 90.3 〇〇Δ 〇PCM-I-20 0.92 0.94 90.3 〇〇Δ 〇PCM-I-21 0.91 0.9 4 85.0 〇〇〇Δ PCM-I-22 0.92 0.95 90.1 〇〇〇Δ PCM-I-23 0.72 0.75 95.3 X 〇〇 △ PCM-I-24 0.88 0.90 90.3 〇Δ X Δ Example PCM-I-25 0.86 0.89 85.2 〇XX Δ PCM-I-26 0.86 0.88 21.5 〇XX Δ PCM-I-27 0.87 0.90 9.6 〇XX Δ PCM-I-28 0.87 0.90 10.6 〇XX Δ PCM-I-29 0.90 0.92 9.8 〇XX 〇 PCM-I-30 0.90 0.92 11.2 〇XX 〇PCM-I-31 0.77 0.80 90.3 X 〇〇Δ PCM-I-32 0.68 0.71 90.5 X 〇 △ PCM-I-33 0.80 0.82 90.2 X 〇〇Δ PCM-I -34 0.78 0.80 90.1 X 〇〇Δ PCM-I-35 0.92 0.95 90.4 〇〇〇Δ PCM-I-36 0.82 0.84 90.2 X 〇〇Δ The pre-coated metal plate of the present invention (PCM-I-1 ~ 22) -Once a metal plate or a plated metal plate has a visible light-reflective undercoating film consisting of a binder resin and titanium oxide, 3 to 30 μm, and a fluorine-containing resin (trifluoroethylene vinyl chloride) on it Resin) binding agent Resin and titanium oxide visible light reflective top coating film 10 ~ 40μιη, and the amount of titanium oxide added in the visible light reflective bottom coating film 40 to 150 parts by mass of 100 parts by mass of the binder resin solid portion, and the amount of titanium oxide added in the visible light reflective top coating film is 40 to 150 parts by mass relative to 100 parts by mass of the binder resin solid portion. The diffuse reflectance of the reflective film is increased, and if it is used in the reflecting plate 37 200426025 of the lighting fixture, the degree of illumination is increased, which is very suitable. In addition, if the amount of titanium oxide added to the visible light reflective top coating film is 80 to 130 parts by mass relative to 100 parts by mass of the solid part of the binder resin, the diffuse reflectance of the visible light reflective film will be further improved, and more As ideal. 5 Either or both of the aforementioned visible light-reflective undercoating film and visible light-reflective topcoating film contain silicon dioxide or a silicon dioxide pigment (PCM + 9 ~ because the gloss of the visible light-reflective film is reduced, and it is used for reflective plates When the image of the light source is difficult to be reflected on the reflective plate, it is more suitable. In particular, the silicon dioxide pigments that adsorb metal ions to silicon dioxide (pCM less than 10) reduce the gloss of the reflective film in addition to visible light. In addition, the surname resistance is also improved, which is more ideal. However, it is equal to either or both of the visible light-reflective undercoating film and the visible light-reflective topcoating film, and the pigments containing stone dioxide or dioxide; Compared with the non-containing ones, the diffuse reflectance of visible light is low. Therefore, from the viewpoint of high diffuse reflectance, it is more suitable to use only a binder resin and titanium oxide. If the metal base material of the pre-coated metal plate is a steel plate or a plated steel plate (PCM small 1 ~ 18, 21), "the twist formability of the pre-coated metal plate is better." Binder resin for visible light reflective top coating film of the present invention The hydroxyl group valence of 20% difluorinated ethylene resin is 10 mg-KOH / g or less, and the addition amount of the cross-linking agent is 20 parts by mass or less relative to 100 parts by mass of the ethylene trifluoride resin (PCM-I- 21), the diffuse reflectance of visible light can be further improved, which is ideal. The visible light reflective undercoating film or visible light overcoating film of pre-coated metal plate 38 200426025 One or both of the amount of titanium oxide added Compared with the solid part of the binder resin, which is less than 100 parts by mass and less than 40 parts by mass (PCM less than 23), the reflectivity will decrease, and the illuminance when it is used in the reflector of a lighting fixture cannot be increased, which is not suitable. The amount of titanium oxide added to one or both of the visible light-reflective undercoating film or visible light top-coating film of the coated metal plate is more than 150 parts by mass relative to 100 parts by mass of the solid part of the binder resin, except for the reflectivity of the film surface. It is hardly improved (the visible light reflectance coating film% using a fluorine-based binder resin exceeds the amount, and the diffuse reflectance is reduced), and the film becomes brittle, which reduces the processability and the wrinkle formability, which is not suitable. In addition, if pre-coated with 10 metal plates Seeing that the film thickness of the under-reflective coating film is less than 3 μm, or the film thickness of the visible-reflective top coating film is less than 10 pm (Pdi-32 ~ 34), the reflectance is reduced, which is not appropriate. Also, pre-coating The thickness of the visible light-reflective coating film of the metal plate exceeds 30 μηι or the thickness of the visible light-reflective top coating film exceeds 40pm (PCM-I-27 ~ 30, 35). The continuous coating method (rolling with the same applicator) is not suitable for coating. In addition, when the binder resin of the visible light reflective top coating film of the pre-coated metal plate is not a fluorine resin, the diffuse reflection on the film surface The rate is lowered, and the illuminance cannot be improved, which is not ideal. Example 2 20 The method of making a pre-coated metal plate for testing is described in detail below. In the same way as in the method for making a pre-coated metal plate in the first addition example, a metal plate with a thickness of 0.6 mm was degreased, washed with water, and dried, and the addition treatment liquid was applied with a roller coater, which was heated with hot air. dry. Next, one side of the metal plate subjected to the addition treatment of 39 200426025 was coated with 15 μm. The coating materials 1-3 shown in Table 1 were used as the light-reflective undercoating film, and the other surface was coated with a roller shoulder applicator. 5 μηι After the universal coating FL100HQ manufactured by Fine-coating Co., Ltd., it was dried and hardened by a hot air induction heating furnace. Next, on the surface coated with the paint with visible light reflectivity, a coating method of 25 μπ1, which is a visible light reflective paint, was applied on a roller shower coater, and then the paint M3 contained in Table 1 was applied. Allow it to dry and harden. The conditions for degreasing and addition treatment were the same as in Example 丨. The details of the pre-coated metal sheet produced are shown in Table 4. In addition, in this embodiment, the following metal plates are used as the original plates. These metal plates are calendered by a calendering roller for coarseness adjustment. The original plate thickness (Ra) used in this experiment is shown in Table 4. GI: a commercially available hot-dip galvanized steel sheet (zinc adhesion amount: 60 g / m2 on one side; material: SGCD3 (JIS G3302)). AL: Commercially available pure aluminum plate (material: 1100 (JISh400)). SUS: a commercially available stainless steel plate (material: SUS430 (JISG4310)). The prepared pre-coated metal plate was subjected to measurement of visible light diffusion reflectance of the visible light reflecting film described in Example 丨). In addition, this measurement measures only the visible light diffuse reflectance at 555 nm. The results of the flat evaluation are shown in Table 4. 40 200426025 Table 4 No. Visible Light Reflective Coating on the Original Plate Visible Light Reflective Coating Diffusion Reflectance (555nm) Type Surface Roughness Ra (pm) Coating Type Film Thickness (μιη) Coating Type Film Thickness (μιη) PCM-II -1 GI 0.16 Paint 1-3 15 Paint 1-13 25 0.95 PCM-II-2 GI 0.64 Paint 1-3 15 Paint 1-13 25 0.95 PCM-II-3 AL 0.12 Paint 1_3 15 Paint 1-13 25 0.95 PCM -II-4 AL 0.04 Coating 1_3 15 Coating 1-13 25 0.93 PCM-II-5 SUS 0.03 Coating 1-3 15 Coating 1-13 25 0.93 PCM-II-6 GI 1.92 Coating 1-3 15 Coating 1-11 25 0.93 If the thickness of the pre-coated metal plate of the present invention is 0.05 to 1.8 pm (PCM-II-1 to 3) in terms of Ra, the diffuse reflectance is less than 0.05 pm (Ra to PCM-II-4, 5) When it is higher than 1.8pm (PCM-II_6), it is more reasonable. Example 3 This example was evaluated after a pre-coated metal plate provided with a heat-absorbing film. The manufacturing method of the pre-coated metal plate used for the experiment is detailed below. In the same manner as in the method of making a pre-coated metal plate in Example 1, a commercially available electron microscope bellword steel plate (zinc adhesion amount: 20g / m2 on one side; material: SECE (JIS G3313); surface roughness Ra = 〇9μιη; thickness: 〇6mm) alkali degreasing, washing with water and drying, and then applying 15 liquids of addition treatment with a roller coater, and drying it with hot air. Next, the surface of the addition-treated metal plate is coated with a roller coater called a melon sheet! The contained coating is used as a visible light-reflective undercoating film, and the other side is coated with the same coating material for 5 μm. Then, it is dried and hardened with a hot air induction heating furnace. Then, it is further applied to the surface coated with visible light-reflective undercoating. Use a roller shower-type coater to apply 20 waves as the surface of 20 visible light reflective coating! The coating is called moxibustion, and the heating furnace is induced to dry and harden with the hot air 41 200426025. In addition, the alkali degreasing and The conditions of the addition treatment and the conditions for baking of each record are the same as those of the implementation. Details of the pre-coated metal plate made from silk are shown in Table 5. In addition, in this experiment, the inner coating is used as follows. 5 Generally, the internal coating materials are [Fine Coating Co., Ltd.'s internal coating materials] [^ 1〇〇] 9 [(gray). Heat-absorbing paint is a heat-absorbing paint made using the following method. First, a commercially available paint Organic solvent-soluble / amorphous poly-ester (hereinafter referred to as poly-ester) "ByronTM gki4〇" (tree average knife · 13000, Tg · 20C) manufactured by Toyobo Corporation is dissolved in an organic solvent (Sorbeso 15〇 and cyclohexanone with mass ratio i Mixed)). Next, a commercially available hexamethylol-methylated trimeramine (Mitsui 15 match) was added to the polymer melt melted in an organic solvent in an amount of 15 parts by mass based on 500,000 parts by mass of polyisocyanate. "Siemel ™ 303" manufactured by Tieke Co., Ltd., 0.5 parts by mass of "Kaiteliste 6003B" manufactured by Nitsui Sieke Co., Ltd., which is a commercially available acid catalyst, was added, and stirred, and A melamine-hardened poly I-based clear coating was obtained. To the clear coating, 100 parts by mass of 15 parts by mass of Tokai Carbon Co., Ltd.'s carbon black "Decarburex # 735〇F" and 5 parts by mass of 20 parts of commercially available conductivity were added to the clear coating solid portion. Pigment (the conductive pigment is mixed with flake-shaped metal stew and chain-shaped metal scrap in a ratio of flake-shaped metal Ni / chain-shaped metal Ni = 6), and then stirred to obtain a heat-absorbing paint. k The details of the evaluation method of the pre-coated metal plate produced are described below 0 42 200426025 1) The visible light diffusion reflectance of the visible light reflective film is measured against the visible light reflection of the pre-coated metal plate produced The surface of the base coating was measured in the same manner as in Example 1 1). However, this measurement measures the reflectance for diffused visible light only at 555 nm. 5 2) Measure the emissivity of the pre-coated metal plate Using a Fourier transform infrared spectrophotometer "VALOR-ΠI" manufactured by Japan Spectroscopy Co., Ltd., for the surface of the pre-coated metal plate coated with the inner coating, determine the order The infrared emission spectrum of the prepared pre-coated metal plate with a wave number of 600 to 3000 cm at a plate temperature of 80 ° C was compared with the emission spectrum of a standard black 10 body to determine the total emission of the metal plate. In addition, the standard black system is used on iron plates and spray-coated with a "TIZ-1-IB Blackbody Spray" (sold by DAX Japan Ltd. and manufactured by Okizuma Corporation) with a film thickness of 30 ± 2 μm. 3) Measurement of illuminance of lighting equipment 15 The same measurement was performed as in Example 3). The evaluation results are shown in Table 5. Compared with ordinary internal paints whose emissivity is less than 0.7 on the inside, heat absorption on the inside with an infrared total emissivity of 0.7 or more at a wavenumber of 600 to 3000 cm-1 at 80 ° C The sex film person (PCM-III-2) has a high illuminance measurement result, and the luminaire becomes bright. 20 Table 5 Diffusion Reflectance of Visible Light Reflective Film Surface of PCM No. Coating at 555nm Measurement Results of Emissivity and Illumination of the Coating Surface of PCM No. PCM-III-1 General Coating 0.9 0.4 Δ PCM-III-2 Thermal Absorptivity Industrial availability of paint 0.9 0.8 〇 With the present invention, a technology can be provided to make the brightness of the light of lighting appliances and light emitting devices 43 200426025 brighter. By means of the present invention, not only the performance of such machines can be improved, but also the energy consumption can be lower than that of the conventional ones to ensure the same performance as the conventional ones, so energy-saving machines can also be provided. Therefore, the present invention can be described as an invention with extremely high industrial value. 5 [Brief description of the drawings] Fig. 1 is a schematic cross-sectional view showing an embodiment of the pre-coated metal plate of the present invention. Fig. 2 is a schematic sectional view showing another embodiment of the pre-coated metal plate of the present invention. 10 Figure 3 is a schematic diagram of a device for measuring illuminance. [Representative symbols for main elements of the drawing] 1 ... Metal plate 12 ... Fluorescent lamp lighting equipment 2 ... Visible light reflective coating film 13 ... Fluorescent lamp 3 ... Visible light reflective Coating film 14 ... Sensor 4 ... Heat absorbing film 15 ... Reflector 11 ... Box 44

Claims (1)

200426025 The scope of patent application: i • -A kind of pre-coated metal plate for reflective plate, which is at least on the surface of the metal plate or the metal plate that has been mineral-coated, with:-containing binder resin and oxide film thickness 3 ~ 30μΐη visible undercoating film; and-set on the visible 5 reflective undercoating film, containing a binder resin containing fluorine-based resin and titanium oxide and film thickness Η) ~ 4_ on the visible light reflectivity A coating film; and the amount of titanium oxide added to the coating film under the visible light reflectivity is oblique to the solid part of the binder resin. The mass fraction is 40 to 150 parts by mass, and the visible light reflectivity is The amount of titanium oxide added in the top coating film is 40 to 150 parts by mass relative to the solid content of the binder resin. 2. The pre-coated metal plate for a reflective plate as described in item 1 of the patent application scope, wherein the visible light reflective topcoat film has a thickness of 10 to 30 μm. ', 3. For example, the reflective plate ㈣ coated metal plate of the scope of application for patent i, wherein the gas-based resin contained in the binder resin of the visible-light reflective film is a tri-gas resin. 4. As a pre-coated metal plate for a reflecting plate according to item i of the patent application, wherein one or both of the visible light reflective upper coating film or the visible light reflective lower coating film is only composed of a binder resin and titanium oxide Constructor. 5. If you are applying for a pre-coated metal sheet for the reflective panel of item i, at least one of the bottom film and the upper layer of visible heterogeneity must contain dioxide or oxidized dioxide. At least one of the Shixi series pigments is the pre-coated metal plate for a reflective plate as described in item 5 of the patent application scope, wherein the silicon dioxide pigment is obtained by adsorbing metal ion-emulsification. 45 6. 200426025 7. If the pre-coated metal plate for reflective plate of item 1 of the scope of patent application is applied, it has a visible light-reflective undercoat film and visible light reflectance on one side of the metal plate or plated metal plate. The coating film has a heat-absorbing film on the other side. The heat-absorbing film has a total infrared emissivity of 0.7 to 80 ° C and a temperature of 20 ° C (5 ° C to 5 ° C). 8. For example, the pre-coated metal plate for reflecting plate of item 1 in the scope of patent application, wherein the surface roughness of the metal plate or the plated metal plate is 0.05 to 1.8 μm in Ra. 9. 10 The pre-coated metal plate for reflecting plate in the scope of the patent application item 1, wherein the metal plate or the plated metal plate is a steel plate or a plated steel plate. 10. An electrical and electronic machine, which is assembled by applying for the first patent scope Any one of 9 to 9 is constituted by a pre-coated metal plate. 46